/Engine/Source/Developer/AssetTools/Public/AssetViewUtils.h
Returns the length of the computed cooked package name and path whether it's run on a build machine or locally
namespace AssetViewUtils { int32 AssetViewUtils::GetPackageLengthForCooking ( const [FString](API\Runtime\Core\Containers\FString) & PackageName, bool bIsInternalBuild ) }